Safety device for gas ranges



Dec. 8; 1925. 1,564,441

' G. E. PICKUP SAFETY DEVICE FOR GAS RANGBS Filed July 5, 1924 GEORGE E.' JE'CU, 0F NEWlRll-, HI, ASSGNOR T0 THE WEHRLE COMPANY, OF NEWARK, HG, ft CORRATON OF OHO.

SAFETY DEVECE FOR GAS RANGES.

Application filed July 5, 1924.

Be it known that l, @iconen lJioKUr, a citizen of the United States, residing at Newark, in the county of Licking and State of Uhio, have invented a certain new and useful Safety Device for IGras ltanges, of which the following is a specification.

'lhis invention relates generally togas ranges of the type embodying a. combination baking and bi'oiling oven, with separate baking and broiling burners; and it relates in particular to a safety device for suoli an oven, which is in the nature of a valve locking device. I

ln gas ranges of the type referred to, the

` oven is equipped at the top with one or more burners for broiling purposes and at the bottom with one or more burners for baking purposes. rlhe burner valves are usually arranged just outside the oven with the fuel pipe entering at the level of the corresponding burners. GbViOuSly, it is essential that when the oven is used for baking the broiler burner or burners be turned off, and vice versa, when the oven is used for broiling, the baking burner or burners be inoperative; but heretofore it has been possible for one accidentally or unknowingly to have both the baking and broiling burners in operation at the same time, which under some cincinnstances may result in an explosion or in the generation of a dangerously excessive amount of heat.

It is the primary object of this invention to provide a safety device of such a character that if one of two or more burners is turned on it is impossible to turn on vthe remaining burner.

1t is a general object of the invention to provide a locking device in the nature of a switching mechanism which permits any one of two valves to be opened at will and thereafter prevents the opening of the second valve while the first is still opened.

Another object of the invention is to provide a construction for the safety device which is simple and capable of being economically manufactured and furthermore to provide one of such a clnracter that it is applicable to present types of stoves and ovens without changing their construction.

In the accompanying drawing, l have shown a device of such a character applied to a gas stove of the type hereinabove set forth Serial No. 724,238.

but it is to be understood that other types of stoves or ovens may be equipped with any other device embodying the principles of the invention.

1n Figure 1 there is represented an oven chamber having broiler burners at the top andbaking burners at the bottom.

Fig. 2 is a view of the oven of F ig. 1 taken from the left hand side along the line 2-2 thereof.

1T igs. 3 and 4 are detailed views of the principal parts of the safety device.

Referring particularly to the drawings, 1() designates the walls of an oven chamber 11. llhe oven is of the ordinary construction, and gas is supplied by a main pipe 12 through feeders 13, 14 and 15. rlhe burners 16 are suitably arranged within the oven. Between tho two feeders 14 and 15 and the burners 16, valves or gas cocks 17 are provided of the ordinary form turning on vertical axes with handles moving in horizontal planes. 1n the drawings, there is one valve with a handle 18 for the broiler burner, and two valves with handles 19 and 2O for the baking burners.

Thesafety device which 1 have provided is of such a character that it holds a closed valve against motion to open it, when it is itself locked by another open valve, the relation being reversible, as will appear from the detailed description hereinafter given.

is a holding means to prevent opening of the upper valve for the broiler burner by the turning of the handle 18 a swinging stop plate 21 is provided which, when vertical, is positioned in front of the handle 18 and alongside the same. In its horizontal position it underlies the handle 18 when the latter is opened, the handle then locking the plate against motion. The plate is pivotally carried by a friction collar 22 in the form of a split sheet metal sleeve mounted about the feeder pipe 14. A radial arm 23 on the collar is connected by a link 211 to similar mechanism at the baking burner valves such that each stop plate occupies reverse positions at the same time.

The valve handles 19 and 20 are similarly blocked against opening by a stop plate 25 swinging on collar 26 about the feeder pipe 15, the relation being the saine as for handle 18, already described. However, it will be observed that the stop plate 25 is longer than the plate 2l, assuming the form ot a bar because oit the provision oi" two valves in the present instance Ytor the baking burners.

The simultaneous reverse relation of the two stop plates is obtained by providing an arm 2? on collar 26 in the reverse direction from arm 23 on collar 22, and by making the link 2d of such a length that one stop plate, say 2l, is substantially horizontal wlile the other plate 25 is substantially vertical (Fig. 2). A bow 28 may be provided in the linlr 24 to adjust the length and to serve as a convenient handle for moving the device from one position to the other when all valves are closed.

llt is clear from the relation already described that when the upper valve is opened, the handle 18 is tree to turn into closed position. llowe fer, in the open position oit' handle 18 (Fig. it is impossible to raise the stop plate 2l since the handle 18 edectively loclts it in its horiigontal position. ln this position the plate 25 is required to be vertical and in the path ot motion of handles :il d so to prvcnt their beingl turned to open the valves to the baking burners. lilith all valves shut oil the safety device may be manuali) switched to either position. Hence, the op eration is the same as above described when any one of the lower two valves is opened the plate 2l then prevent-ing opening` ot the upper val-ve 18.

l claim as my invention:

l. A. gas oven having, in combination, an oven chamber, upper and lower burners, valves therefor, two feed pipes tor said burners located respectively adjacent the valves, two stop plates mounted for swinging .n'ioveinent respectively about the alles ot said pipes, and means connecting said stop plates and adapting them 'for simultaneous movement, the arrangement being such that when either valve is in open position the other stop plate is positioned so as to hold its valve in closed position.

2. A gas oven having, in combination, an oven chamber, upper and lower burners, valves theretor, two parallel leed pipes lor said burners located respectively adjacent said valves, tw triction collars one littingij snugly about each ci? said pipes andeach beina' rotatable about the axis oi its pipe, a rigid stop plate on each ot said collars morn able into the path ci operation of the adjacent burner valve, and means connecting said collars whereby one of said plates is always in position to prevent the openin` of its valve when said other valve is open.

A gas oven having in combination, an oven chamber, upper and lower burners, valves therefor, two parallel feed pipes for recta-4.1

said burners located respectively adjacent the val-ves, collars in the form of split sheet metal sleeves one mounted on each of said pipes, a rigid stop plate on each ot said collars movable when the collar is rotated on its pipe into the path ot' operation ot the adjacent valve, and means pivotally conneeted to each ot said collars tor simultaneously rotating them about the respective aires ot said pipes, said stop plates being positioned so that when either ot said valves is open the other plate holds its valve closed.

A safety device tor gas ranges having a combiner baking;` and hzffiiling oven with upper and lower burners and separate valves therefor comprising, in combination, two stop plates mounted to turn ou separate axes located respettively adjacentthe separate valves, and means connecting said two stop plates, the arrangement being such thatv when either oit the valves is in open position the stop plate ot the other valve is positioned so as to hold its valve in closed position.

A gas oven having, in combination, an oven chamber. burners therefor, parallel gas feeding pipes tor the oven, a set o valves trom each pipe to supply gas to the burnersI in the oven, radial valve handles for said valves, said handles being parallel with the pipes in th-e ofi" position and transY verse thereto in the open position, collars turnable on each pipe, stop plates carried by said collars and movable by a turningr ot the collars into the path of operation of the valve handles in the closed position of the valve, the valve being` movable into the path ot motion ot the stop plate in the other position ot the plate. projecting arms on each oit said collars, and a link connecting; said aims, said arms being' arranged on the collars relative to the stop plate thereon in reverse directions whereby the openina' ot one valve in one set prevents motion ol the collars and the opening ot the reinaiifiingg,` valve.

6. It safety device for gas ranges having a combined baking and broiling oven with upper and lower burners and valves therefor, comprising', in combination, two stop plates mounted to turn on parallel axes located respectively adjacent the two valves, and means connecting said stop plates, the arrangement being such that when either of the valves is in open position the stop plate of the other Ivalve is positioned so as to hold its valve in clos-ed position.

ln testimony whereot, l have hereunto atied my signature.

GEORGE E. PCKUP. 

